Scaffold



p 21, 1955 c. E. PETERSEN 3,207,261

' SGAFFOLD Filed Sept. 27, 1963 2 Sheets-Sheet l INVEN TOR. (4.04 a. Fins? 867V United States Patent ice 3,207,261 SCAFFGLD Carl E. Petersen, 301 100th St., Brooklyn, NY. Filed Sept. 27, 1963, Ser. No. 312,105 2 Claims. (Cl. 182-129) The present invention relates to a scaffold of the type especially useful to painters, paper hangers, carpenters, masons, bricklayers, etc.

It is an object of the present invention to provide a scaffold of relatively simple construction which is highly efficient in operation and use.

It is another object of the present invention to provide a scaffold which has provision for mounting a work platform or work holder in a plurality of different positions.

It is another object of the present invention to provide a scaffold having provision to mount a set of steps or the like thereon.

It is a further object of the present invention to provide a scaffold which has a high degree of mobility and a high degree of adaptability for use under many different and varied conditions.

Other and further objects and advantages of the present invention will be readily apparent to those skilled in the art from a consideration of the following specification taken in connection with the appended drawings.

In the drawings which illustrate the best mode presently contemplated for carrying out the invention,

FIGURE 1 is a side elevation view with portions broken away for purposes of illustration of a scaffold apparatus pursuant to the present invention;

FIGURE 2 is a top plan view of the scaffold apparatus illustrated in FIGURE 1;

FIGURE 3 is a fragmentary sectional view on an enlarged scale taken on the line 33 of FIGURE 2;

FIGURE 4 is a view which illustrates the assembly of a holder for a paint can or the like with the scaffold apparatus of the present invention;

FIGURE 5 is a top plan view of the scaffold device with the paint can holder removed;

FIGURE 6 is a fragmentary sectional view on an enlarged scale taken on the line 66 of FIGURE 5;

FIGURE 7 is a top plan view of a holder which may be utilized with the scaffold device of the present invention for holding a paint tray or the like with portions being broken away and illustrated in section for purposes of illustration;

FIGURE 8 is a fragmentary view of the holder and a paint tray;

FIGURE 9 is a view similar to FIGURE 8 and illustrates another form of holder which can be utilized with the scaffold device for holding tools or the like;

FIGURE 10 is a fragmentary exploded view in side elevation and illustrates a removable platform for use with the scaffold device;

FIGURE 11 is a fragmentary sectional view on an enlarged scale taken on the line 1111 of FIGURE 10;

FIGURE 12 is a fragmentary sectional view on an enlarged scale taken on the line 1212 of FIGURE 5; and

FIGURE 13 is a fragmentary perspective view and illustrates a set of stairs mounted on the scaffold device of the present invention.

Referring now to FIGURES l-6 in detail, there is shown a scaffold apparatus 10 pursuant to the present invention. As here shown, the scaffold 10 comprises a mobile platform assembly which includes a floor 12 preferably formed of wood or other suitable material mounted by a metallic framework generally indicated by the reference numeral 14. The framework 14 comprises four vertically disposed angle irons 16, 18, and 22 to which there is secured a pair of longitudinally extending angle 3,207,261 Patented Sept. 21, 1965 irons 24 and 26, the angle irons 16, 18, 20 and 22 constituting the vertical elements of the framework 14 and the angle irons 24 and 26 constituting the horizontal elements of said framework. The angle iron 24 extends between the angle irons 16 and 20 and the angle iron 26 extends between the angle irons 18 and 22. A11 oblique brace 28 extends between the vertical angle iron 18 and the horizontal angle iron 26 and an oblique brace 30 ex tends between the vertical angle iron 20 and the horizontal angle iron 24. A horizontal rod 32 extends between the vertical angle irons 20 and 22 and a similar horizontal rod 34 extends between the vertical angle irons 16 and 18. Each vertical angle iron mounts a roller or caster 36 at the lower end thereof said casters being of the type which can swivel through 360 and each caster being provided with a brake 38 which is readily manually operable. The framework 14 also includes a pair of vertical struts 40 and 42 which depend from the horizontal angle iron 26, as best illustrated in FIGURE 1 and which mount a horizontal rod 44. A ladder 46 which is provided with a pair of horizontal arms 48 each having a hook portion 50 thereon is provided for gaining access to the platform 12. In this connection, it will be understood that the ladder may be moved in the direction of the arrow 52 in FIGURE 1 so as to engage the hook portions 50 on the transverse rod 32 for releasably securing the ladder in the oblique position relative to the scafliold 10 which is illustrated in FIGURE 3. It will be understood that each of the brakes 38 is set in position for immobilizing the platform or scaffold device 11) With the ladder 46 .mounted thereon. The horizontal bar or rod 44 is similarly utilized to support the ladder 46. The hook portions 50 of the arms 48 engage the bar 44 and thereby support said ladder relative to the scaffold in the manner heretofore indicated.

In addition to the previously mentioned longitudinally extending horizontal angle irons 24 and 26, the vertical angle irons 16, 18, 20 and 22 also mount a pair of transversely extending horizontal angle irons 54 and 56. The four horizontal angle irons 24, 26, 54 and 56 form a framework bed or support on which the fioor or platform 12 is mounted. Below the platform or floor 12, the framework 14 also mounts one or more horizontal preferably metallic plates 58.

As here shown, the scaffold assembly 10 is provided with three socket assemblies 60, 62 and 64. Each socket assembly comprises a socket 66 which is secured in the metallic plate 58 and which extends through the overlying floor 12. Each socket 66 is internally threaded so that it is adapted to receive a socket fitting 68. Each socket fitting 68 comprises a hub 70 from which there depends a threaded shaft 72 and from which there projects upwardly a post 74. Each hub 70 is provided also with a handle 76. It will be apparent that by utilizing the handle 76 each threaded shaft 72 of an associated socket fitting 68 may be threadedly secured within an associated socket 66 as best shown in FIGURE 6 so that the associated post 74 extends upwardly above the floor or platform 12. As here shown, the socket assemblies 60 and 62 are laterally aligned substantially centrally of the floor or platform 12 adjacent the marginal edge 78 thereof. The third socket assembly 64 is in transverse alignment with the socket 60 and is disposed inwardly of the opposing longitudinal marginal edge 80 of the platform 12, the distance between the socket assembly 64 and the adjacent longitudinal edge 80 being greater than the distance between the socket assembly 60 and its adjacent longitudinal edge 74.

The three triangularly related socket assemblies 60, 62 and 64 adapt the scaffold device 10 for mounting thereon a suitable raised platform or raised support or work holder.

A raised support platform or work holder 82 is illustrated in FIGURES 1, 2, 4 and diagrammatically shown in FIGURE 5. As here shown, the raised platform 82 comprises a horizontal frame 84 of generally square or rectangular configuration having three tubular elements or legs 86, 88 and 90 which depend therefrom. The tubular legs are interconnected by a supporting brace framework generally indicated by the reference numeral 92. The

frame 84 is provided also with the cross struts 94 and 96 which mount a raised central disc 98.

The trilegged platform assembly 82 is adapted to be mounted on the platform 12 in the three positions indicated by the letters A, B and C in FIGURE 5. More specifically, it will be apparent that the platform assembly 82 may be mounted in the position thereof illustrated in FIGURE by aligning the tubular legs 86, 88 and 90 thereof, as the case may be, with the underlying posts 74A, 74B and 74C and moving the platform assembly 82 downwardly as indicated by the arrow 100 to engage the underlying posts within the associated tubular legs. More specifically, in the condition of the raised platform assembly 82 illustrated in FIGURE 2 which corresponds to the position B thereof as shown in FIGURE 5, it will be understood that the post 74A is engaged within leg 86, the post 74B is engaged within leg 88 and the post 74C is engaged within leg 90. In the position of the raised platform assembly 82 indicated at A in FIGURE 5, the assembly is rotated by 180 from the position thereof illustrated in position B. In position A, the leg 88 receives the post of socket assembly 62, the leg 86 receives the post of socket assembly 60 and the leg 90 is positioned laterally outwardly from the adjacent marginal edge 78 of platform 12. In the position of the raised platform assembly indicated at C in FIGURE 5, the raised platform is rotated platform is rotated or displaced by 90 from the position thereof indicated at B, In this position, the post of socket assembly 64 is engaged in leg 86 and the post of socket assembly 60 is engaged in leg 88 and leg 90 overlies the platform 12 adjacent and inwardly of the marginal edge 78. In each of those positions a paint can 100 may be seated and retained in position on the disc 98 as best shown in FIGURE 4.

A modified form of raised platform assembly or work holder 102 is illustrated in FIGURES 7 and 8. The work holder 102 is especially adapted to releasably retain or position a paint tray 104. The work holder 102 is essentially the same as the work holder 82 except that the Work holder 102 is provided on the upper surface of the rectangular frame 84 thereof with a wooden plank 106 which overlies the disc 98. The paint tray 104 is provided with a raised portion 108 which overlies the plank 106 when a clip 110 provided on the lower surface of the tray 104 engages under the plank 106 so as to releasably mount the tray in position on the raised work piece platform 102.

Referring now to FIGURE 9, there is illustrated another modified form of raised platform or holder 112. As here shown, the raised holder 112 is also essentially the same as the raised holder 82 except that the holder 112 is provided with a tool tray 114 which is mounted on the upper surface of the frame 84. The tray 114 is adapted to receive various different types of tools or brushes or other instrumentalities generally indicated by the reference numerals 116 and 118.

It will be apparent from the foregoing that with a raised work holding platform positioned on the floor or platform 12, a workman may readily mount to the top of the scaffold by ascending the ladder 46 and then perform the work that he has to do. His paint or other tools will be readily accessible to him by being mounted on or contained within the raised support or holder 82, 102 or 112 as the case may be. However, it may be necessary for the workman to reach a higher point than is possible if he stands on the floor or platform 12. For this purpose, provision is made for a removable platform 120 which may be mounted on the scaffold 10 so that a workman may reach a higher position that is possible if he stands on the platform 12. For this purpose, each of the vertical angle irons 16, 18, 20 and 22 is provided with a laterally projecting detent 122. The removable platform comprises a floor or base 124 of generally rectangular construction and slightly larger in both its longitudinal and transverse dimensions than the platform or support 12. The platform or floor 124 is provided at the corners thereof with depending arms 126 each of which terminates at the free end thereof in the bifurcation 128. Each bifurcation 128 is adapted to engage therein a detent 122. Consequently, it will be readily apparent that the removable platform 120 may be positioned in overlying relationship relative to the floor or platform 12 by superimposing the platform 120 over the platform 12 and engaging the bifurcated ends 128 of the four depending arms 126 thereof with the detents 122 on the four vertical angle irons. In order to provide additional support for the raised platform 120 when so engaged on the scaffold 10, the floor 124 may be provided with the depending rods 130 which engage the upper surface of the underlying floor 12 when the platform 120 is superimposed on the scaffold 10.

Pursuant to another inventive aspect of the present invention, provision is made to provide the scaffold 10 with a removable set of stairs 132 as best shown in FIG- URES 12 and 13. As here shown, four substantially square sockets 134, 136, 138 and 140 may be provided at each side of the triangularly related tubular socket assemblies 60, 62 and 64 as best shown in FIGURE 5. Each of the square sockets is mounted in a metallic plate 58 as best shown in FIGURE 12 and extends through the overlying floor or platform 12 for access thereto. The set of stairs 132 is provided with four posts 142, 144, 146 and 148, the latter not being illustrated in FIGURE 13, which are adapted to be removably received in the square sockets 136, 140, 138 and 134 respectively. As will be apparent from FIGURE 3, a set of stairs may be provided at each end of the scaffold 10 so that a workman may reach a higher position at each end of the platform.

In view of the foregoing, it will be apparent that there has been illustrated and described a highly novel and useful scaffold assembly of the mobile type which is adapted to mount raised work holding or material platforms thereon or the height of which may be raised by means of an add platform or added sets of stairs.

While I have illustrated and described the presently preferred embodiment of my invention, it will be apparent that various changes and modifications may be made therein without however departing from the basic inventive concept thereof as set forth in the appended claims.

I claim:

1. In combination, a scaffold comprising a framework provided with a raised elongated-platform, said platform having three sockets provided therein, said sockets being in triangular relation, and a holder device provided with three legs depending therefrom, said three legs being in the same triangular relation as said three sockets, and said three legs being adapted to be removably mounted in said three sockets whereby said holder may be mounted in three different positions on said platform.

2. In combination, a scaffold comprising a framework provided with a raised elongated platform, said platform having three sockets provided therein, said sockets being in triangular relation, and a holder device provided with three legs depending therefrom, said three legs being in the same triangular relation as said three sockets, and said three legs being adapted to be removably mounted in said three sockets whereby said holder may be mounted in three different positions on said platform, two of said sockets being in alignment longitudinally of said platform and adjacent to one side edge thereof, and the third socket being in alignment with one of said two sockets in a direction transversely of said platform, whereby the 5 6 holder can be mounted alternately in a first position over- 2,665,174 1/54 Clarke 1821"/8 lying all three sockets, in a second position overlying only 2,672,659 3/54 Becker 28720 said two sockets and extending outwardly of said one side 2,954,093 9/60 Fitzgerald 182129 edge or in a third position overlying only said one and 3,012,626 12/61 Marryatt 182-413 said third sockets. 5 FOREIGN PATENTS References Cited by the Examiner 226,901 2/60 Australia.

1,057,625 10/53 France. UNITED STATES PATENTS 1,203,172 7/59 Rama 1,912,947 6/33 Martin 182179 2,222,078 11/40 Kroeger 182129 10 HARRISON R. MOSELEY, Primary Examiner. 2310962 2/43 Emma 182-108 REINALDO P. MACHADO, Examiner.

2,601,926 7/52 Speaker 182178 

1. IN COMBINATION, A SCAFFOLD COMPRISING A FRAMEWORK PROVIDED WITH A RAISED ELONGATED PLATFORM, SAID PLATFORM HAVING THREE SOCKETS PROVIDED THEREIN, SAID SOCKETS BEING IN TRAINGULAR RELATION, AND A HOLDER DEVICE PROVIDED WITH THREE LEGS DEPENDING THEREFROM, SAID THREE LEGS BEING IN THE SAME TRIANGULAR RELATION AS SAID THREE SOCKETS, AND SAID THREE LEGS BEING ADAPTED TO BE REMOVABLY MOUNTED IN SAID 